Machine for the manufacture of blown-glass articles.



B. D. GHAMBERLIN. MACHINE POR THB MANUFACTURE OPBLOWN GLASS ARTICLES.

APPLICAToN HLM) muv. 1911.

Patented J an. 12, 1915 NNN www

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B. D. CHAMBBRLIN.

MACHINE Foa THB MANUFACTURE 0F BLOWN GLASS ARTICLES.

APPLICATION FILED P11117. 191 1.

Patented Jan. 12, 1915` '3 SHBETS-BHEBT 2,

m NQ Q mi B. D. CHAMBERLIN.

y MAGHXNE FOR lTHE MANUFACTURE 0F BLOWN GLASS ARTICLES. 1,124,699.

APPLICATION HLM) I'EB. 7, 1911y Patented Jan. 12, 1910.

SSHEETS'SHEET 3.

. .QW Rw Www-y plieable to the better BENJAMIN DAYA CHAMBERLIN,

0E CORNING, NEW YORK, ASSIGNOR TO EMPIRE MACHINE COMPANY, OF PORTLAND, MAINE, A CORPORATION OF MAINE.`

MACHINE FOB,\THE MANUFACTURE 0F BLOWN-GLASS ARTICLES. I

Application filed February 7, 1911.

.To all whom t may concern:

Be it known that I, BENJAMIN D. CHAM- nEnLiN, a citizen of the United States of America, and a resident of Corning, New York have invented certain new and useful improvements in Machines for the Manufacture of Blown-Glass Articles, of which the following is a specification.

This invention has for 1ts object to provide a novel mechanism for producing blown glass articles of those kinds which are made from masses of roughly preshaped upon t e end of a blowv iron into a blank in y suitable way, and are subsequently broullit to a finished shape by blowing in a mold, it being especially apgrades of such articles, as electrical lamp bulbs and other Ithin products. I have found that in the suc walled production of these it is advantageous that the preformed blank have a limited and definite quantity of air introduced into it and have t e pressure so created positively held for a s ort period. The amount of air introduced at this time is relatively small and a small leakage has therefore the effect of greatly reducing the predetermined pres, sure in the blank, with a variation of the amount the latter is blown out, which acts to destroy uniformity in the subsequent molding. It is important therefore that the amount of air so introduced be capable of ari accurate determination and be sufficient to result in the formation of a central cavity of practically uniform size in the interior of the blank when the air so introduced has Hnished its expansion and that it be held within the blank until such time without leakage.

My invention therefore consists in mechanism for accomplishing this and comprises a piston pump foi; delivering on each stroke a definite volume of air under definitel pressure to tlie blank, and of means for holding the pressure so created until the air has fully expanded therein. The amount of air necessary for molding has no definite relation to the amount of air necessary in blowing out and my invention therefore further contem plates a separate and additional air supv ply for-*that purpose with proper means for controlling the admission of air.

My invention further consists in the construction. combination and arrangement of Speoication of Letters Patent.

glass which areff is a view similar to mechanism thereof.

Patented Jan. 1,2, 1915. Serial No. 607,1 79.

the several parts of which it is composed and which will be hereinafter more fully described and claimed.

Referring to the accompanying drawings in which corresponding. parts are designated by corresponding marks of reference, Figure 1 is a diagrammatic view of a machine embodying one form of my invention. Fi 2 is a sectional detail view of the blow-out mechanism thereof. Fig. 3 is a detail el va-4 tion of the 'pump actuator of Fig. 2.` i fig.

Fig. 1 but showing another form of. machine, which embodies the preferred form of my invention.` Fig. 5 is a longitudinal section of'tllf' blow out Fig. 6 ,if anenlarged elevation of the blow-out iiiechanism and its mounting. Fig. 7 is a topi plan view thereof.

From'what has been said it wi-ll be understohd that this invention is not restricted to the manner in which the blank may be put on the blow-pipe or the manner in which it may be preformed, and while I have in tl'e accompanying drawings shown the preforming mechanism in the form of a plain faced inai'verer, it will be understood that this may be replaced by any other mechanism capable of properly preshaping the blank without departing from the spirit of my invention.

As shown in-Y Figs. 1, 2 and 3 the mechanism for carrying out this invention forms a part of that shown in my other application filed March 23, 1910, Serial No. 551,198 and comprises :i supporting arm 1, on which is pivoted by a vertical pivot 2, a blow-pipe carrying frame 3, in the free ond of which is horizontally journaled the stem 4 of the blow-pipe support 4, the stein having upon its forward end a cross head 1" which holds the radially projecting blowpipe 5, the latter projecting through a cross head at right angles to the stein, so that the blow' pipe by the rotation of the stem will be moved in a vertical plane. This rotation of the stern is provided for by keying a beveled gear 6 thereon in the rear of a bearing formed in the blow-pipe frame and driving the same through a pinion 6El outer end of a horizontal shaft 6b contained in a longitudinal bearing in the web of the carrying frame. This shaft is driven by mechanism not necessary to be herein defast on the' t rounding the shaft 6h scribed, the function of which is to lift the gather ou the end of the blow-pipe, and to then lower such gather end until the blowpipe stands` vertically. Mechanism is also provided fcrrotating the blow-pipe around its longitudinal axis and for this purpose the blow-pipe is joui-nailed in the cross head 4l and'is provided with packing rings around the end rif-such journal. The upper end of the blow-pipe projects above the cross head and has keyed thereon a beveled gearing 8, which, through the intei'position of a double beveled gearing 8 sleeved on the stem 4** between the front face of the frame and cross head, is driven by a beveled pinion 8'* keyed to the outer end of a sleeve 8C surand contained in the longitudinal bearing of the blow-pipe frame. This shaft is constantly drive'n by mecha nism which is not necessary to be here described.

The arm l has suitably formed therein an air port 9 communicating by the air passage 9"L with the air tank 9b for the blowing air, a suitable valve 9" being interposed in the air connectionV for the purpose of controlling the How of blowing air, this air valve being actuated by means of a cam 9 actuated in the manner described in my prior application. Situated vertically below the air port 9 at ysuch a distance that a blowpipe having its upper end immediately bcneath the air port and in Contact therewith will have its lower end in proper relation thereto for molding. is the mold if), the nature of which is fully shown in mv said prior application. The vertical line joining the mold and the air port is also so situated in respect to the vertical axis upon which the blow-pipe frame turns` that bv swinging the latter upon sach. axis the blow-pipe carried in the `frame when vertical will register with the said air port and be above the mold.

Mounted upon the arm l is an are shaped niarverer l1 with its center of curvature at the axis of the stein of the blow-pipe support when the blow-pipe frame carrying such support is extended outwardly on its supporting arm and being so positioned that the blow-pipe when swung at such time on the horizontal pivot formed by such stem will have the gather thereon in contact with the marverer. V

The above mechanism is all fully shown and described in my said prior application together with actuating devices wherebv the proper coaction of the parts is secured, the action being such, that the gather on the blow-pipe is swung up and along the marvering face. is then lowered by a reverse movement until the blow-pipe is vertical and that the blow-pipe frame is moved on its horizontal pivot to insert the blow-pipe beneath the air port and above the mold,

after which the air valve 9 admit blowing air into the the air reservoir 9b.

For the purpose of accomplishing the blowing out of the gather prior to its insertion in the mold and prior to the elongation which it Aundergoes when the blow-pi e is vertical a blow out mechanism is emp oyed which forms the subject matter of this application. As shown such means consists of a pump cylinder l2 secured to the rear face of the blow-pipe carrying frame 3. The longitudinal bore in the blow-pipe cross head 4th is provided with a central enlargement l2" and the blow-pi e has radial apertures 5* communicating etween its central bore and such enlargement. The stem 4* has a central passage 12'extendin from such enlargedY recess to its; opposite end where it is closed by a plug 12 and where it has radial ports 12d whose outer ends terminate in an annular groove 12 in the sleeve near its end. Surrounding the end of the stein is a collar 13 which is interposed between the hub of the beveled gear 6 and the cap 12f on the extreme rear end of the stem. The collla 13 s in its one side an perture 13 n i h re ar groove 12 in the stem and is connected with the cylinder 12 by the pipe 13" in which is interposed the check valve 13", whereby air can flow from said cylinder through the central assage 12 of the stem into the interior of i ie blow-pipe.

Within the cylinder l2 is contained the piston 1;- normally thrown out by the spring 14 to draw air .in through the induction valve 13d. The piston 14 has on i outer end roller 14 adapted to be stru by a cam l5 carried on the gear 6 and thus on the stem of the blow-pipe support, and being thus adapted to drive thel piston within the cylinder to force a pull of air into the blowpipe at the proper tim In order to provide for variation in th s time and further to permit a reciprocating rotary motion of the blow-pipe stem 4* with theupuif occurring only when the stem is moving in one direction I employ the construction shown in Fig. 3 in which the cam 1 5 is 1n the shape of an arm pivoted at 15" to a uadrant plate 15, the arm being held at a out the position shown by a spring 15": With this construction when the stem 4 is rotated in the direction .of the arrow in Fig. 8, the arm 15 will pass the r'oller 14b without actu ation of the pump and plunger, dueto the turning of the arm upon its pivot and will after passing the same immediately swing back to the position shown, Upon the reversed rotation of the stein however the is operated to blow-pipe for notched free end of the arm will become seated on the roller and will result in an inward stroke of the plunger until the arm nally slides by the movement of the sters with the annu nieuwe arm in this direction being limited by the stop pin In order to provide for a change in the time lat which this inward stroke of thelplunger takes place and thus a change of the time of the puff of air admitted to the blow-pipe, the q idrant plate is angularly adjustable on. and in respect to the stem l by mounting the quadrant plate on a disk 16, it being secured by the T slots 1G formed in the disk and by proper clamping bolts 16 entering the same. It will be noted that as at the time of the putl` the blow-pipe is not underneath the air port but that the upper end of the bore of the blow-pipe is sealed by reason of the fact that a plunger 17EL to be hereinafter described is at such times projected by its spring 17 and thus the escape of the air at such period is prevented.

The gear 8 mounted upon the end of the blow-pipe carries a cap 1,7 having a central bore in which is contained a. plunger 17, pressed outwardly toward the to of the cap by a spring 1T", the vplunger iaving a rounded end and an axial central hole 17 extending froml such end inwardly and connecting with the periphery of the plunger near the rear end thereof by radial. ports 17, the construction beiiig such that, when the plunger is projected by the spring, the pons 17d will be closed by the cap but, that when. the plunger is depressed such ports will open and the central hole 17C of the plunger will be in communication with the central bore of the blow-pipe through the ventral chamber of the gear 8. In the move ment of the blowpipe in the operation of the machine, its upper end, will at certain times be brought beneath the airports 9 and at such times the plunger will be de` pressed to admit the flow of molding air into the blow-pipe n hen the air 'valve 9 is opened.

ln Figs. 4. 5, 6 and 7. l have shown the preferred form of my present invention as applied to machine shown in my other )rior application tiled January i3, 191], uerial No. 602,532. lr. these figures a, removable blow-pipe is carried in the blow-pipe frame 18 mounted in a horizontal truunion 18, the blow-pipe being adapted to be swung through a limited vertical arc by means o1' the rack sector 19 actuated by kcam disk lll* so that the gather thereon may be moved past a marverer20 and presented to a mold 21, the latter occurring when the blow-pipe is vertical. The blow-pipe frame earries on one end a chuck 22, which consists. of a block 22 having mounted on its forward ends by ball bearings a shell Q2 by which is carried suitable means for engaging the blow-pipe, as is fully shown ia my prior application, Serial No. 632,532, The chuck shell has an interior packing 22 surroundw ing an axial aperture 22d, the end of the blow-pipe taking against the packing. The. chuck block has an air passage 22a registering with the aperture and connected through the cylinder 26 to be hereinafter described lo an air pipe 23 which enters the hollow trunnion of the blowpipe Jframe and from there connects to the reservoir "23 for the blowing air, a suitable valve 2 n actu ated from the main cam, disk i9 being interposed in the air connection is full set forth in my said prior application ierial No. 602,532. The chuck shell has a gear 24 upon its periphery through which by suitable .means fully shown in my last named application 602,532, the blow-pipe is rotated. An air tight joint is secured between the stein 22" of the shell and a block by a cupped leather washer 25 against a shoulder on the block by a ring 25E, an in ternalljry coned ring 25 surrounding the flange. 25 of the washer. The result of this construction is that the air pressure existing during the blowing' upon the rear end of the ring forces the latter forwardly to ccmpress the flange upon the stern of the shelle For the purpose of introducing:r the proper quantity of blow-out air in the manner be tore specified a cylinder 26 is mounted on the rear ot' the chuck block Q2 and contains a piston 126 passing through a stuling box 26h in the. cylinder by which it is guided The piston has on its forward end a sliding head 26 provided ,with portsQtd which, when the head is at its rear limit of move ment on the piston, are closed by a washer 26c`on the piston in the rear of the head. The rear' end of the piston has a cross head Q7 thereon` from the opposite. ends of which links 27'* project forwardly lto the upper end of a yoke lever 27".y pivoted at 27 to a support from the rear end o't a blow-pipe frame. To the lower end of the lever 27" is secured the forward end of the link 2T guided for longitudinal movement on the inner side of the blow-pipe frame` its forwardV rnd terminati g in a nger' which is adapted when t e bloiwvpipe frame is moving to vertical position to run upon n track mounted eccentrieally on the main frame 28'* of the machine in respect to the bearing of the bleu/pipe iframe trunnion., whereby at the time stated the piston ,will be retracted by the track against the tension of a spring 2?. When the piston is so retracted the link 2 ,7l will be caught. ley a trigger 28 piro-ted at the bottom of the blow-pipe frame, which trigger is adapted to he released from the lint; by a i i on the main rame as the gather approzufhts ts upper limit of movement.

In the practical operation of the inarhine l' have constructed it, the air control is as follows: As the gather aseends and before it quite leaves themarverer the blow-- out air 1s introduced by the release of the link 27a by the trigger 28 and such admission of blow-out air is completed about the time the gather on its descent passes the same oint. The air is introduced in such Quantity as'will result in the formation of :1 central cavity of practically definite size in. the interior of the gather hen the air so introduced has finished it expansion. The air thus introduced in the gather is held there until its expansion is completed which occurs about when the blow-pipe is horizontal. In the continued descent of the gather to molding position one or more sli ht puffs of air are admitted tothe gather Irom the main air supply, or it may be that a slight and continued flow of air into the gatherfrom such supply is admitted, the ooject being to swell the gather. During the elongation there is also an admission of air to keep it plump and to aid in the even distribution during the drawing out. As the mold is closing the admission of air from a main air supply is made for the moldin The gather movement to present the gather to the mold also retracts the piston 26 against the tension of its spring 27', where it will be caught by the trigger 28, power being thus stored up to force the blow out air into the ,ext gather.

I desire to l:all attention to the necessity, especially in the manufacture of light and delicate articles, such as bulbs for incandescent electric lamps, of introducing a limited and definite quantity of air into the preformed blank and positively holding in the gather for a short period the pressure so created. The amount of air introduced into the blow-pipe at this time is.relatively small, and a small leakage has therefore the effect of greatly reducing the predetermined pressure in the blank, with a variation in the amount the blank is blown out which acts to destroy uniformity in the subsequent molding. Hence it is important that the sealing of the blow-pipe be as perfect as possible, and the ability to accomplish this is aided by placing the source from Iwhich the blow--out air is derived, and the valve by lwhich it is controlled, both as close to the blow-pipe as possible, as the number of possibly leaky joints is thus reduced. It will be noted that in the construction shown in Figs. 4 to 7 the sourceand valve for the blow-out air are both on the blow-pipe frame and immediately adjacent to the end of the blow-pipe. Moreover since the valve for releasing the blow-out pressure is in thc connection between the source'of molding air and the blow-pipe, its use does not provide any additional point at which the molding air may escape, while the use of a piston pump, such as shown, for delivery directly to the blow-pipe on each stroke the exact quantity of air necessary for the blow-out, provides for the precise regulation of the air pressure forvthat purpose. It will be further noted that the blow-out air introduced into the blank is entirely separate and distinct from any air that may be subsequently introduced into the blank to give it the shape of the finished article.

Inasmuch as the claims of this application are restricted to air mechanisms, I do not by failure to make herein claims directed to other inventive features shown herein abandon the same. Claims covering certain of such other features are made in my Vother application, Serial Number 491,812, filed April 23, 1909, and in my applications, Serial Numbers 551,198 and 602,532 beforereferredl to, as well as in my other application Serial Number 737,403, filed December 18, 1912, as a division of my said application 602,532. y

Having thus described my invention what I claim is:

1. In a machine for the manufacture of g( 'blown glass articles, the combination with a glass carrier adapted to support an unconned body of plastic glass, an intermittently actuated air compressor and connections therefrom for delivering air to the interior of the unconfined lastic glass, the compressor being consti` cted to deliver on each actuation the volume necessary to properly swell the glass and means for subsequently admitting air for molding, into the glass.

2. In a machine for the manufacture of blown glass articles, the combination with a glass carrier adapted to support an unconfined body of plastic glass, an intermittently actuated air compressor and connections therefrom for delivering air to the interior of the unconined plastic glass, the compressor being constructed to deliver on each actuation the volume of air necessary to properly swell the glass, means for sealing in the glass the pressure so created, and means for subsequently admitting into thc glass air for molding.

3. In a glass blowing machine, the combi nation with a supply of air under pressure, of a blow-pipe, a connection `for introducing air for molding from the air supply into the blow-pipe, and a pump interposed in the air 11.5 connection for introducing a limited amount of air into the pipe prior to the molding and for holding it therein by closing the said air connection and for opening the said conJ nection prior to the molding.

4. In a glass blowing machine, the combination with a blow-pipe frame oscillating to present the gather on the blow-pipe therein for molding, of a pump cylinder on the said frame, a spring pressed piston in the said .126 pump, a latch for holding the piston in its retracted position, and means successively actuated b the movement of the frame toward mol ing position to release the latch and to retract t e piston.

5. n -a glassv blowing machine, the combination with a frame adapted to receive a blow-pipe, of a source Vof air under pressure for molding, a connection between the air source and the pipe, a pump cylinder on the blow-'pi e frame in the Said connection, a piston or the said pump and ine-ans actnated by the movement of the frame prior to f reaching molding position to ectuate the pump piston and compress 'a limited amount of air in the blowvpipe, and to hold it therein, and means actuated by e subsequent movement of the frame to retract the piston and release the pressure.

. 6. In a glass blowing machine, the conibif nation with an oscillating frame adapted to receive a removable blow-pipe, and present it for molding, off a cylinder mounted in the frameV and connected with the 'interior of the pipe, a source or'A molding air under pressure connected with the cylinder, a piston contained in the cylinder, a spring tending to make a compression stroke of the piston and to cause it to close the conneton between the source of air and the ipe, a latch adapted to hold the piston agalnst the pressure of the spring, means for releasing the latch on the movement of the frame -toward molding position, an actuatinglink to retract the said piston and a cam track engaged by the said link on the further niovement of the frame prior to the frame reaching molding position.

In testimony whereof I have signed my name in the'presence of two witnesses.

BENJAMIN im Cameranu.

In presence of- G. WILLIS Dumm, R. HmCURTxS. 

